
#box{
	width: 600px;
	height: 600px;
	margin: 50px auto 0px;
	border: 1px solid red;
}

#left_box{
	float: left;
	width: 200px;
	height: 600px;
	background: red;
}

#left_box div{
	width: 198px;
	height: 198px;
	border: 1px solid black;
	text-align: center;
	font: 30px/200px "simsun";
}

#right_box{
	float: right;
	width: 400px;
	height: 600px;
	background: green;
}

#right_box div{
	width: 400px;
	height: 600px;
	text-align: center;
	font: 30px/600px "simsun";
	display: none;
}